Share-Based Payment Arrangements (Summary Of Information Regarding Stock Options) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 25, 2010	Dec. 26, 2009
Share-Based Payment Arrangements [Abstract]
Options outstanding at the beginning	2,295,831	2,557,802	2,505,644
Options outstanding at the beginning, Weighted Average Exercise Price per Share	$ 39.73	$ 36.86	$ 35.47
Options exercisable at the beginning, Number of Options	936,081	1,225,802	822,211
Options exercisable at the beginning, Weighted Average Exercise Price per Share	$ 38.85	$ 32.43	$ 30.75
Granted, number of options	273,000	230,250	367,000
Granted, Weighted Average Exercise Price per Share	$ 41.79	$ 37.41	$ 38.20
Exercised, number of options	(111,355)	(424,354)	(207,342)
Exercised, Weighted Average Exercise Price per Share	$ 34.84	$ 20.73	$ 19.31
Forfeited, number of options	(130,700)	(67,867)	(107,500)
Forfeited, Weighted Average Exercise Price per Share	$ 41.48	$ 42.64	$ 42.77
Options outstanding at the end, number of options	2,326,776	2,295,831	2,557,802
Options outstanding at the end, Weighted Average Exercise Price per Share	$ 40.11	$ 39.73	$ 36.86
Options exercisable at the ending, Number of Options	1,110,743	936,081	1,225,802
Options exercisable at the ending, Weighted Average Exercise Price per Share	$ 39.74	$ 38.85	$ 32.43